elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 1/9 general description the elp3301 is a 1.2mhz pwm boost switching regulat or designed for constant-voltage boost applications . the elp3301 can drive a string of up to 30v. the elp330 1 implements a constant frequency 1.2mhz pwm contro l scheme. the high frequency pwm operation also saves board space by reducing external component sizes. to improve efficiency, the feedback voltage is set to 1250mv, which reduces the power dissipation in the voltage setting resistor. highly integration and internal c ompensation network minimizes as 5 external compone nt counts. optimized operation frequency can meet the requirem ent of small lc filters value and low operation cur rent with high efficiency. features ? high efficiency: 90% ? ? 1.2mhzfixed-frequency pwm operation ? maximum output voltage up to 30v ? guaranteed 13v/200ma output with 5v input ? operating range : 2.7v to 5.5v ? shutdown supply current:<1ua ? ? programmable soft-star ? available in sot23-6/sot23-5 package ? ? minimize the external component ? rohs compliant and 100% lead (pb)-free applications panel bais voltage supply ? oled backlight driver ? notebook computers portable applications mid/ptv
elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 2/9 pin assignments pin description sot-23-5 sot-23-6 pin name pin function 1 1 lx switch pin. connect this pin to inductor and catch diode. minimize the track area to reduce emi. 2 2 gnd ground pin 3 3 fb feedback reference voltage pin. series connect a re sistor between vout and ground as a voltage sense. the fee dback voltage is 1250mv. 4 4 /shdn chip enable (active high). voltage sensing input to trigger the function of over voltage protection. note that this pin is high impedance. there should be a pull low 100k resistor connected to gnd when the control signal is floating. 5 ss softstar pin. leave ss open to disable the so ft-star function. 5 6 vin supply input voltage pin. bypass 1uf capacitor to g nd to reduce the input noise. ordering information elp3301 nn xx x part number package marking marking information elp3301nnb2r ELP3301NNB3R sot23-5 sot23-6 b2 sot23-5 b 3 s o t 2 3 - 6 r tape & reel sot23-6 sot23-5
elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 3/9 function block diagram typical application circuit elp 3 3 0 1
elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 4/9 absolute maximum ratings supply input voltage----------------------------- --------------------------------------------------- ------------------?0.3v to 6.0v lx input voltage -------------------------------- --------------------------------------------------- ---------------------?0.3v to 30v the other pins ---------------------------------- --------------------------------------------------- ---------------------?0.3v to 5.5v power dissipation, pd @ ta = 25c tsot-23-5/6---- --------------------------------------------------- ------------0.455w lead temperature (soldering, 10 sec.) ----------- --------------------------------------------------- ------------------- 260c operation temperature range --------------------- --------------------------------------------------- ----------?40c to 80c storage temperature range ----------------------- --------------------------------------------------- ----------?65c to 150c electrical characteristics parameter symbol test condition min typ. max units system supply input operation voltage range v dd 2.7 5.5 v under voltage lock out v dd 2.2 2.4 2.6 v supply current i dd fb=1.2v, switch 430 550 ua shut down current i dd v en < 0.4v 0.1 1 ua line regulation v in : 3.0~4.3v 2 % oscillator operation frequency f osc 1.2 mhz maximum duty cycle 93 % feedback voltage elp3301 1.22 1.25 1.28 v mosfet on resistance of mosfet r ds(on) 0.4 sw current limit i lm 1 a protection shut down voltage v en 0.3 v enable on voltage v en 1.0 v elp6230a
elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 5/9 typical operation characteristics
elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 6/9
elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 7/9 applications information inductor selection the recommended value of inductor for 30v applicati ons are 4.7 to 22h. small size and better efficien cy are the major concerns for portable device, such as lp3301 used for mobile phone. the inductor should have low core loss at 1.2mhz and low dcr for better efficiency. t o avoid inductor saturation current rating should b e considered.
elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 8/9 package information
elp3301 e-cmos corp. (www.ecmos.com.tw) 5k06n - rev. f001 1.2mhz,30v/1a high performance, bo ost converter 9/9
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